Releasable base with four ferrules for crutch



FIG. 1 is a perspective view of a releasable base with four ferrules for crutch showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a side view for showing the releasable base mounted on the bottom of a crutch.

The broken line portions in FIGS. 7-8 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a releasable base with four ferrules for crutch, as shown and described. 